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Björn Baumbach dc280f88be samba-tool: fetch "no such subcommand" error and print error message
This patch especially improves the case where extra arguments are used.

Without this patch just the attributes are mentioned as invalid, if
samba-tool is called with an invalid/unknown subcommand.

Example without this patch:
  # samba-tool sites list --all
  Usage: samba-tool sites <subcommand>

  samba-tool sites: error: no such option: --all

This can be deceptive for users. Is looks like the "list" command
does not provide a "--all" option.

Example with this patch:
  # samba-tool sites list --all
  samba-tool sites: no such subcommand: list

  Usage: samba-tool sites <subcommand>
  (...)

Signed-off-by: Björn Baumbach <bb@sernet.de>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>

Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Wed Apr 29 08:08:21 UTC 2020 on sn-devel-184
2020-04-29 08:08:21 +00:00
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